Poppet valve



Spt; i1; 1923.

H. J. BACHMAN PoPPET VALVE Filed March 5", 1922 l INVENTOR.y /l/Lfgo J. Bacbma/r Patented Sept. 11, 1923.

UNITED STATES i i. 1 A A. v

HUGO J. BACHMAN, or DENVER, COLORADO.

POPPET VALVE.

Application filed March 3, 192.2.l Serial No. 540,682. l

To all whom t may concern:

Be it known that I, HUGO J. BACHMAN, a citizen of the United States, residing at Denver, in the county of Denver and State of Colorado, have invented certain new and useful Improvements in Poppet Valves, of which the following is a specification. My invention relates to poppet valves and more particularly to improvements in valves of the type used in internal combustion engines to control the flow of motive fluid to and from their explosion chambers, and it is the primary object of the invention to provide a pop-pet valve of very simple form which in comparison with valves of the solid construction commonly used, has an increased iiow capacity in ratio to its lift.

I attain this object by forming in the h'ead of a poppet valve of suitable proportions,

one or more ports which when the valve is in its closed position, are closed by its en` gagement with an auxiliary seat. When in the operation of the engine with which the valve is associated, the latter is lifted oli' its seat, the How o-f motive fluid through its opening is augmented by that passing through the ports, with the result that the capacity of the valve for the passage of fluid is correspondingly increased in proportion to the extent to which it is moved by the action of its operating mechanism.

An additional advantage resulting from the above described construction, resides in that the reduced area of the effective surface of the head of the valve, owingl tothe Figure 2 a plan view of the improved valve;

Figure 3, a section taken on the line 3 3, Figure 2; and

Figure 4, a bottom view of the valve, showing the stem thereof in transverse section.

Referring more specifically to the drawings, the reference numeral 2 designates the part of an engine which the valve is ap.-

plied, including a bevelled valve `seat 3, a

sleevebearing 4L for the valve-stem, in the line of the axis thereof, and a conical auxiliary valve seat 5 at the end of the bearing. Y, The valve 6 consists of a tapering head 7 at, the end of stein 8 which ist slidably fitted in the bearing 4. v

The headhas at .its outer end, a bevelled face 9 co-operating with the correspondingly formed valve seat 8 and its inner end surface is dished as at 10 to fit upon the auxiliary valve seat when the valve is in its closed position.

The valve head has a number of ports 12 extendingI between its inner and outer surfaces, which in the construction shown in the drawing, flare at their outer ends.

When the valve is in its closed position, as shown at the right hand side of Figure l of the drawings, these ports are closed by the engagement of the dished inner'end of the vvalve with the correspondingly formed seat atfthe end of the stem-bearing, and when the valve is ylifted off its seat, as shown at the other side of the same ligure.

the ports are simultaneously uncovered, and the fluid confined at a side of the valve may thus passthrough its opening not only by the annular passage between its circumferential `surface and the bevelled seat 3, but also by the passages provided by the open ports 12.

It will thus be evident that the flow capacity of the valve is greatly increased over that of valves of solid head-construction, in ratio to its liftJ andr that the openings between the opposite surfaces of the head at the same time decrease the resistance to its opening movement. v

A kerf 13 in the outerend ofthe valve permits of the application of a screw driver for its adjustment or removal.

What I claim and vdesire to secure by Letters Patent is:

l. In a valve construction of the character described. a machine element having two y axially alined valve-seats, and ay valve pro-- vided with faces adapted to simultaneously covered by the engagement of said face with the respective seat.

2. In a valve construction of the character described, a machine element having a bev-y elled seat and a conical seat in axial alinement therewith, and a valve having two faces which fit upon said seats in its closed position and having ports which terminate in one of said faces and are covered by its engagement with the conical seat.

3. In a valve construction of the character described, a machine element having a valve seat, a bearing for a valve-stein, and an auxiliary valve Seat at the end of the bearing, and a valve having a stein in said bearing and ahead on theI stem having two faces adapted to engage with Said seats when the valve is in its closed position, the head having ports which terminate in one of said faces and are covered by its engagement with the auxiliary seat.

4. In a valve construction of the character described, a machine element having a valve seat, a bearing for ak valve-Stem, and a conical valve-seat at the end of the bearing, and a valve` having a Stem in said bearing and a head on the stem, provided with two faces adapted to engage simultaneously with both seats when the valve is in its closed position, the head having ports terminating in the face engaged by the conical seat;

5. In a valve construction of the character described, a machine element having two valve-seats, and a valve having .two faces which it upon said seats, and having transverse porte which terminate in one of the faces and are covered by engagement of said face with the respective seat.

In testimony whereof I have affixed my signature.

HUGO J. BACHMAN. 

